一种用于同时检测铁和铜的基于罗丹明的双化学传感器。
A Rhodamine-based Dual Chemosensor for the Simultaneous Detection of Fe and Cu.
作者信息
Lan Tao, Wang Feng-He, Xi Xing-Jun, Cheng Chun-Wen, Lei Wu, Xia Ming-Zhu, Wang Feng-Yun
机构信息
Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Environment, Nanjing Normal University.
出版信息
Anal Sci. 2016;32(11):1223-1229. doi: 10.2116/analsci.32.1223.
A Rhodamine-based dual chemosensor L1 for simultaneously detecting Fe and Cu was designed and synthesized. The spectroscopic properties of L1 were analyzed, and its recognition mechanism was speculated. We found that the addition of Fe induced a great fluorescence enhancement, while Cu induced a strong UV-Vis absorption enhancement. The results revealed that L1 was highly selective for recognizing Fe and Cu in UV-Vis spectroscopy in CHOH-HO (1/1, v/v, pH 7.2) with the interference of other metal ions. A good linear relationship between the fluorescence intensities of L1 and the concentration of Fe, as well as the UV-Vis absorption intensities of L1 and the concentration of Cu was observed, respectively. The detection limit was 9.2 × 10 M (5.5 μg/L) for Fe and 3.8 × 10 M (2.4 μg/L) for Cu, respectively. The detection capacity for targeted metal ions of Fe and Cu were studied, which are less than 5 min. Job's plot method for L1 with Fe and ESI-MS for L1 with Cu indicated a 1:1 stoichiometry in the complex. The results may provide an effective strategy for the design of new dual chemosensors for the rapid detection of targeted metal ions.
设计并合成了一种基于罗丹明的双化学传感器L1，用于同时检测铁和铜。分析了L1的光谱性质，并推测了其识别机理。我们发现，加入铁会导致荧光大幅增强，而加入铜会导致紫外-可见吸收大幅增强。结果表明，在CHOH-HO（1/1，v/v，pH 7.2）中，L1在紫外-可见光谱中对铁和铜具有高度选择性，不受其他金属离子干扰。分别观察到L1的荧光强度与铁浓度以及L1的紫外-可见吸收强度与铜浓度之间具有良好的线性关系。铁的检测限分别为9.2×10 M（5.5μg/L），铜的检测限分别为3.8×10 M（2.4μg/L）。研究了L1对目标金属离子铁和铜的检测能力，检测时间均小于5分钟。L1与铁的Job曲线法以及L1与铜的电喷雾质谱法表明配合物的化学计量比为1:1。这些结果可能为设计用于快速检测目标金属离子的新型双化学传感器提供有效策略。
Zotero 插件